M&S says

Everyone needs some fluffy slippers to look forward to at the end of a punishing day on busy feet, and our fabulous mule slippers are just that. With a fabulously soft and cosy inner and outer layer that makes them a real treat on hardworking feet, these bow slippers are the perfect welcome home.

Care and Composition

35 days to return
You may return unused products within 35 days of purchase with a valid parcel summary document. Your items don't need to be in the original box or bag as long as they're securely packaged.

How to return
Simply use our returns portal to print a returns label and returns note. You will then be able to return all or part of your order at your own cost through your preferred carrier. To create a returns label, visit our returns portal select this option and follow the instructions.